What crashed Automake?@StevenLiekens I got lucky - was searching with the error message, specifically around struct flock and stumbled upon vasilis' solution at bugs.php.net/bug.php?id=65423 . I'm hoping the PHP devs will either add libtool as dep when opcache's enabled, or give a more useful autoconf / make error message. I've also submitted a similar patch for github.com/Homebrew/homebrew-php PHP >5.5 and hope it gets accepted